1995 Mariner Mercury Outboards Service Manual 50HP 4-Stroke, Page 126Get this manual
Camshaft 1Inspect the camshaft for pitting, heat discoloration, scratches and for the following measurementsReplace camshaft if worn or not within specificationMeasure the cam lobe length (a) and width (b)
Cylinder Head
1 Inspect the cylinder head for the following conditions: Mineral depositscorrosion in water passage waysCarbon Deposits In Combustion Chamber (use round scraper to clean away deposits)Be careful not to scratch or remove materialInspect cylinder head for warpageReplace cylinder head If out of specification2
Cam Lobe Specifications